256202231 has 2 divisors, whose sum is σ = 256202232. Its totient is φ = 256202230.

The previous prime is 256202209. The next prime is 256202237. The reversal of 256202231 is 132202652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256202231 - 2¹⁰ = 256201207 is a prime.

It is a super-2 number, since 2×256202231² = 131279166338754722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256202197 and 256202206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256202237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128101115 + 128101116.

It is an arithmetic number, because the mean of its divisors is an integer number (128101116).

Almost surely, 2^256202231 is an apocalyptic number.

256202231 is a deficient number, since it is larger than the sum of its proper divisors (1).

256202231 is an equidigital number, since it uses as much as digits as its factorization.

256202231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 256202231 is about 16006.3184711538. The cubic root of 256202231 is about 635.1275755827.

Adding to 256202231 its reverse (132202652), we get a palindrome (388404883).

The spelling of 256202231 in words is "two hundred fifty-six million, two hundred two thousand, two hundred thirty-one".